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pci-v4.20-fixes-2

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Merge tag 'pci-v4.20-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

 - Fix a link speed checking interface that broke PCIe gen3 cards in
   gen1 slots (Mikulas Patocka)

 - Fix an imx6 link training error (Trent Piepho)

 - Fix a layerscape outbound window accessor calling error (Hou
   Zhiqiang)

 - Fix a DesignWare endpoint MSI-X address calculation error (Gustavo
   Pimentel)

* tag 'pci-v4.20-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: Fix incorrect value returned from pcie_get_speed_cap()
  PCI: dwc: Fix MSI-X EP framework address calculation bug
  PCI: layerscape: Fix wrong invocation of outbound window disable accessor
  PCI: imx6: Fix link training status detection in link up check
This commit is contained in:
Linus Torvalds 2018-12-01 11:32:49 -08:00
commit c734b42583
4 changed files with 13 additions and 24 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/pci/controller/dwc/pci-imx6.c
View file

@ -81,8 +81,6 @@ struct imx6_pcie {
#define PCIE_PL_PFLR_FORCE_LINK (1 << 15)
#define PCIE_PHY_DEBUG_R0 (PL_OFFSET + 0x28)
#define PCIE_PHY_DEBUG_R1 (PL_OFFSET + 0x2c)
#define PCIE_PHY_DEBUG_R1_XMLH_LINK_IN_TRAINING (1 << 29)
#define PCIE_PHY_DEBUG_R1_XMLH_LINK_UP (1 << 4)
#define PCIE_PHY_CTRL (PL_OFFSET + 0x114)
#define PCIE_PHY_CTRL_DATA_LOC 0
@ -711,12 +709,6 @@ static int imx6_pcie_host_init(struct pcie_port *pp)
return 0;
}
static int imx6_pcie_link_up(struct dw_pcie *pci)
{
return dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R1) &
PCIE_PHY_DEBUG_R1_XMLH_LINK_UP;
}
static const struct dw_pcie_host_ops imx6_pcie_host_ops = {
.host_init = imx6_pcie_host_init,
};
@ -749,7 +741,7 @@ static int imx6_add_pcie_port(struct imx6_pcie *imx6_pcie,
}
static const struct dw_pcie_ops dw_pcie_ops = {
.link_up = imx6_pcie_link_up,
/* No special ops needed, but pcie-designware still expects this struct */
};
#ifdef CONFIG_PM_SLEEP

2
drivers/pci/controller/dwc/pci-layerscape.c
View file

@ -88,7 +88,7 @@ static void ls_pcie_disable_outbound_atus(struct ls_pcie *pcie)
int i;
for (i = 0; i < PCIE_IATU_NUM; i++)
dw_pcie_disable_atu(pcie->pci, DW_PCIE_REGION_OUTBOUND, i);
dw_pcie_disable_atu(pcie->pci, i, DW_PCIE_REGION_OUTBOUND);
}
static int ls1021_pcie_link_up(struct dw_pcie *pci)

1
drivers/pci/controller/dwc/pcie-designware-ep.c
View file

@ -440,7 +440,6 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
tbl_offset = dw_pcie_readl_dbi(pci, reg);
bir = (tbl_offset & PCI_MSIX_TABLE_BIR);
tbl_offset &= PCI_MSIX_TABLE_OFFSET;
tbl_offset >>= 3;
reg = PCI_BASE_ADDRESS_0 + (4 * bir);
bar_addr_upper = 0;

24
drivers/pci/pci.c
View file

@ -5556,9 +5556,13 @@ enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev)
u32 lnkcap2, lnkcap;
/*
* PCIe r4.0 sec 7.5.3.18 recommends using the Supported Link
* Speeds Vector in Link Capabilities 2 when supported, falling
* back to Max Link Speed in Link Capabilities otherwise.
* Link Capabilities 2 was added in PCIe r3.0, sec 7.8.18. The
* implementation note there recommends using the Supported Link
* Speeds Vector in Link Capabilities 2 when supported.
*
* Without Link Capabilities 2, i.e., prior to PCIe r3.0, software
* should use the Supported Link Speeds field in Link Capabilities,
* where only 2.5 GT/s and 5.0 GT/s speeds were defined.
*/
pcie_capability_read_dword(dev, PCI_EXP_LNKCAP2, &lnkcap2);
if (lnkcap2) { /* PCIe r3.0-compliant */
@ -5574,16 +5578,10 @@ enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev)
}
pcie_capability_read_dword(dev, PCI_EXP_LNKCAP, &lnkcap);
if (lnkcap) {
if (lnkcap & PCI_EXP_LNKCAP_SLS_16_0GB)
return PCIE_SPEED_16_0GT;
else if (lnkcap & PCI_EXP_LNKCAP_SLS_8_0GB)
return PCIE_SPEED_8_0GT;
else if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
return PCIE_SPEED_5_0GT;
else if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
return PCIE_SPEED_2_5GT;
}
if ((lnkcap & PCI_EXP_LNKCAP_SLS) == PCI_EXP_LNKCAP_SLS_5_0GB)
return PCIE_SPEED_5_0GT;
else if ((lnkcap & PCI_EXP_LNKCAP_SLS) == PCI_EXP_LNKCAP_SLS_2_5GB)
return PCIE_SPEED_2_5GT;
return PCI_SPEED_UNKNOWN;
}